/*
* @author dumeng
*/
'use strict';
/*
  动态设置 :root的font-size
*/
((doc, win) => {
  var docEl = doc.documentElement
  var resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize'
  var recalc = () => {
    var clientWidth = docEl.clientWidth
    if (!clientWidth) {
      return
    }
    docEl.style.fontSize = clientWidth * 75 / 750 + 'px'
  }

  if (!doc.addEventListener) {
    return
  }
  win.addEventListener(resizeEvt, recalc, false)
  doc.addEventListener('DOMContentLoaded', recalc, false)
})(document, window)
